Compressor stalls out

by Rocky
(Sudbury, Ontario, Canada)

Hi

I recently switched tanks on my twin piston electric compressor. Old tank rotted out.

Now, I've lined up everything, Motor, compressor and belt. The only change was the repositioning of the Air gauge and safety blow off valve.

When I plug it in, it will get to 70 to 90psi. Then, the motor and compressor slow right down (Stalls) and I have to unplug it right away for fear of damage to the motor or compressor.

If I plug it in minutes later, it might pump a little bit, but stalls again. I had the motor rebuilt a few years ago. Like I mentioned, everything ran fine until I switched the tank.

Thx... And looking forward to your reply
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Assuming that all electrical components are in good shape, no change in supply power, numbers of electrical items using power at the same time on the same circuit etc. Rocky, that you changed your tank suggests to me that your compressor problem may be tank check valve related.

I would shut down the air compressor, dump all the tank air (good time to check the PRV too) and then pull and check the tank check valve.

After you have done that, post a comment here with your findings, and we'll press on if need be.

Cheers,

Bill

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Air Compressor has a little thing popping out

by Nikki
(Boise, Id.)

Hi, I bought my domestic partner an air compressor for his birthday.

Even though I am a male I seriously don't know the first thing about a air compressor and the truth is, neither does he!

He said a little thing on it keeps popping out after running a few seconds and it is loud while it loses all the air from it.

I was hoping you may be able to help us with just this amount of information, for it is making him grumpy to be around every time he tries to use it.

PLEASE help with this so we can get back to a nice normal life again. Thank you so much, Nikki :)
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G'day Nikki.

Would be good to know the make and model of the air compressor in question. If you bought it, then your bill of sale should provide that information, or the compressor itself will have that info on it.

I would suggest that you start a new thread, and upload along with it a photo or two of your compressor, particularly of the "little thing" that pops out. I think I know what you refer to, but don't want to jump to conclusions and end up giving wrong advice.

Cheers, and here's to normalcy (whatever that means) in our lives!

Bill

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The power kicks on and off.

by Emery
(Coker Creek, Tennessee)

Plug it in, and turn switch on, nothing happens. Tap on switch and other areas, and power kicks on. Turn it off, and then back on, and no power again.
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Dump all the air in the tank, Emery. Try to start the air compressor.

No start? With a multi-meter check to see if power is passing the pressure switch and flowing to the motor circuit. If so, your pressure switch is working.

If not, your pressure switch may be at fault.

If power flows and nothing is happening, then the next check is the start capacitor. See that page on this site.

Bill

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compressor quits pumping and stalls at 35 psi

by Van
(Meridian, MS, USA)

got an older double cylinder ( side by side ) compressor with 1 hp motor. runs and pumps fine up to 30 psi, then motor starts slowing like is is being pulled down, pumps to 35 psi and then stalls out completely.
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Lugging of the compressor motor can be caused by a number of issues.

If this is a new issue, and your power supply hasn't changed, then it's likely not that.

That leaves issues like the run capacitor or the motor itself failing, perhaps an intake or pressure valve is causing problems as the back pressure increases, or the tank check valve itself may not be opening fully as the tank pressure rises.

It were my compressor I would start with checking the check valve, then test the run capacitor, before getting a motor load test, and then tearing down the pump.

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